AN ENDOR STUDY OF THE TEMPERATURE-DEPENDENCE OF METHYL TUNNELING

被引：9

作者：

BONON, F ^{[1
]}

BRUSTOLON, M ^{[1
]}

MANIERO, AL ^{[1
]}

SEGRE, U ^{[1
]}

机构：

[1] UNIV MODENA,DIPARTIMENTO CHIM,I-41100 MODENA,ITALY

来源：

CHEMICAL PHYSICS | 1992年 / 161卷 / 1-2期

关键词：

D O I：

10.1016/0301-0104(92)80192-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied the motion of the methyl group in the free radical obtained by gamma-irradiation of 4-methyl-2,6-di-t-butylphenol (MDBP). The ENDOR spectra have been measured in the temperature range 4.5 to 200 K. The positions of the methyl proton lines are temperature dependent. Their variation is accounted for by considering the transition from the quantum regime of motion of the methyl group at low temperature to the classic regime at higher temperature. This transition is found to occur in a temperature range narrower than that anticipated by Allen's theory.

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页码：257 / 263

页数：7

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